/Engine/Source/Runtime/MeshDescription/Public/MeshDescription.h
Determines the vertex instances which form the perimeter of a polygon
void FindPolygonPerimeter ( [TArrayView](API\Runtime\Core\Containers\TArrayView)< const [FTriangleID](API\Runtime\MeshDescription\FTriangleID) > Triangles, [TArrayView](API\Runtime\Core\Containers\TArrayView)< [TTuple](API\Runtime\Core\Misc\TTuple)< int32, int32 >> Result ) const